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Troubleshooting of PHP errors: Difference between revisions
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* 可否讀取或寫入：例如 imagejpeg($canvas, $filename, 100); 沒有顯示錯誤訊息，則需要 | * 可否讀取或寫入：例如 imagejpeg($canvas, $filename, 100); 沒有顯示錯誤訊息，則需要 | ||
** 檢查暫存目錄是否可以寫入 [http://stackoverflow.com/questions/1520956/php-way-to-find-the-web-servers-temp-path upload - PHP way to find the web server's temp path? - Stack Overflow] | ** 檢查暫存目錄是否可以寫入 [http://stackoverflow.com/questions/1520956/php-way-to-find-the-web-servers-temp-path upload - PHP way to find the web server's temp path? - Stack Overflow] | ||
** 檢查該檔案所在該目錄是否已經建立，若未建立則需要建立 [http://php.net/manual/en/function.mkdir.php mkdir]，並設定可以寫入。如果是巢狀的多層目錄，則需要啟用 $recursive | ** 檢查該檔案所在該目錄是否已經建立，若未建立則需要建立 [http://php.net/manual/en/function.mkdir.php mkdir]，並設定可以寫入。如果是巢狀的多層目錄，則需要啟用 $recursive <ref>[http://stackoverflow.com/questions/2303372/create-a-folder-if-it-doesnt-already-exist php - Create a folder if it doesn't already exist - Stack Overflow] code snippet: <nowiki>mkdir('path/to/directory', 0755, true);</nowiki> </ref> | ||
** 檢查該檔案是否可以寫入 [http://php.net/manual/en/function.is-writable.php is_writable] | ** 檢查該檔案是否可以寫入 [http://php.net/manual/en/function.is-writable.php is_writable] | ||